TLS Malloc Fixes

[StevenMiller123]

In games like Attack on Titan 2, the current heap API implementation can cause issues specific to Linux. By disabling the heap API malloc calls, like we do on Windows, these games can progress further. If you're in the shadPS4 discord, this message will provide more context: https://discordapp.com/channels/1080089157554155590/1258386683691274361/1288493573200810005

Also fixes a minor oversight in the Windows TLS code, where no malloc calls were made if there was no heap_api provided by the game. This appears to fix inconsistent crashes when testing Uncharted 4 on Windows.